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The economy of the eyes: precepts for the improvement and preservation of the sight. Plain rules which will enable all to judge exactly when, and what spectacles are best calculated for their eyes. Observations on opera glasses and theatres, and an account of the pancratic magnifier, for double stars, and day telescopes (1824)

Kitchiner, William, 1775?-1827 · London : Hurst, Robinson & co. · leaf 16

An illustration from The economy of the eyes: precepts for the improvement and preservation of the sight. Plain rules which will enable all to judge exactly when, and what spectacles are best calculated for their eyes. Observations on opera glasses and theatres, and an account of the pancratic magnifier, for double stars, and day telescopes, 1824, leaf 16
for thebenefit of Posterity. * Were there no other use of Optics, than the inven-tion of Spectacles for the help of defective Eyes, I shouldthink the advantage which mankind receives thereby,inferior to no other benefit whatever, not absolutely requi-site to support Life. — Molyneuxs Optics. f The… … Fry. 5. ScaU efTruhej- Engraved fry I. Stewart. Fuilis?ud by Mefs™Ifurst ScRobinson,. 1824. INTRODUCTION. d The accomplished Artist, almost as soon ashe acquires his Art, would be incapable ofpursuing it, — the seeds of perfection which hehas been industriously cultivating during theFirst period of…

Eyeglasses · Telescopes

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